body{
	margin: 0;
	padding: 0;
	font-family: sans-serif;
	background: url(../images/l.jpg)  no-repeat center 0px;
	background-size: cover;
 
    
}
.denglu{
    border: 1px solid white;
    width: 30%;
    text-align: center;
    margin: 0 auto;
    margin-top: 15%;
    background: #00000080;
    padding: 20px 50px;
}
.denglu h1{
    color: white
}